NextCloud webui can't loading my content when using Simplified Chinese

I found my nextcloud 12.0.3 WebUI can‘t loading my content properly after I logged in, there is a circle gif still rolling but load nothing my data. I need to click ‘Recnet’ at left navbar, and then click 'All files`, my content can display.

Because I use the Simplified Chinese language, so I change it to English, the problem is sovled.

I think this is a little bug, could you check and fix it?